drivers/gpu/drm/nouveau/nouveau_gem.c

   1 /*
   2  * Copyright (C) 2008 Ben Skeggs.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26 #include "drmP.h"
  27 #include "drm.h"
  28
  29 #include "nouveau_drv.h"
  30 #include "nouveau_drm.h"
  31 #include "nouveau_dma.h"
  32
  33 #define nouveau_gem_pushbuf_sync(chan) 0
  34
  35 int
  36 nouveau_gem_object_new(struct drm_gem_object *gem)
  37 {
  38         return 0;
  39 }
  40
  41 void
  42 nouveau_gem_object_del(struct drm_gem_object *gem)
  43 {
  44         struct nouveau_bo *nvbo = gem->driver_private;
  45         struct ttm_buffer_object *bo = &nvbo->bo;
  46
  47         if (!nvbo)
  48                 return;
  49         nvbo->gem = NULL;
  50
  51         if (unlikely(nvbo->cpu_filp))
  52                 ttm_bo_synccpu_write_release(bo);
  53
  54         if (unlikely(nvbo->pin_refcnt)) {
  55                 nvbo->pin_refcnt = 1;
  56                 nouveau_bo_unpin(nvbo);
  57         }
  58
  59         ttm_bo_unref(&bo);
  60
  61         drm_gem_object_release(gem);
  62         kfree(gem);
  63 }
  64
  65 int
  66 nouveau_gem_new(struct drm_device *dev, struct nouveau_channel *chan,
  67                 int size, int align, uint32_t flags, uint32_t tile_mode,
  68                 uint32_t tile_flags, bool no_vm, bool mappable,
  69                 struct nouveau_bo **pnvbo)
  70 {
  71         struct nouveau_bo *nvbo;
  72         int ret;
  73
  74         ret = nouveau_bo_new(dev, chan, size, align, flags, tile_mode,
  75                              tile_flags, no_vm, mappable, pnvbo);
  76         if (ret)
  77                 return ret;
  78         nvbo = *pnvbo;
  79
  80         nvbo->gem = drm_gem_object_alloc(dev, nvbo->bo.mem.size);
  81         if (!nvbo->gem) {
  82                 nouveau_bo_ref(NULL, pnvbo);
  83                 return -ENOMEM;
  84         }
  85
  86         nvbo->bo.persistant_swap_storage = nvbo->gem->filp;
  87         nvbo->gem->driver_private = nvbo;
  88         return 0;
  89 }
  90
  91 static int
  92 nouveau_gem_info(struct drm_gem_object *gem, struct drm_nouveau_gem_info *rep)
  93 {
  94         struct nouveau_bo *nvbo = nouveau_gem_object(gem);
  95
  96         if (nvbo->bo.mem.mem_type == TTM_PL_TT)
  97                 rep->domain = NOUVEAU_GEM_DOMAIN_GART;
  98         else
  99                 rep->domain = NOUVEAU_GEM_DOMAIN_VRAM;
 100
 101         rep->size = nvbo->bo.mem.num_pages << PAGE_SHIFT;
 102         rep->offset = nvbo->bo.offset;
 103         rep->map_handle = nvbo->mappable ? nvbo->bo.addr_space_offset : 0;
 104         rep->tile_mode = nvbo->tile_mode;
 105         rep->tile_flags = nvbo->tile_flags;
 106         return 0;
 107 }
 108
 109 static bool
 110 nouveau_gem_tile_flags_valid(struct drm_device *dev, uint32_t tile_flags) {
 111         switch (tile_flags) {
 112         case 0x0000:
 113         case 0x1800:
 114         case 0x2800:
 115         case 0x4800:
 116         case 0x7000:
 117         case 0x7400:
 118         case 0x7a00:
 119         case 0xe000:
 120                 break;
 121         default:
 122                 NV_ERROR(dev, "bad page flags: 0x%08x\n", tile_flags);
 123                 return false;
 124         }
 125
 126         return true;
 127 }
 128
 129 int
 130 nouveau_gem_ioctl_new(struct drm_device *dev, void *data,
 131                       struct drm_file *file_priv)
 132 {
 133         struct drm_nouveau_private *dev_priv = dev->dev_private;
 134         struct drm_nouveau_gem_new *req = data;
 135         struct nouveau_bo *nvbo = NULL;
 136         struct nouveau_channel *chan = NULL;
 137         uint32_t flags = 0;
 138         int ret = 0;
 139
 140         if (unlikely(dev_priv->ttm.bdev.dev_mapping == NULL))
 141                 dev_priv->ttm.bdev.dev_mapping = dev_priv->dev->dev_mapping;
 142
 143         if (req->channel_hint) {
 144                 NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel_hint,
 145                                                      file_priv, chan);
 146         }
 147
 148         if (req->info.domain & NOUVEAU_GEM_DOMAIN_VRAM)
 149                 flags |= TTM_PL_FLAG_VRAM;
 150         if (req->info.domain & NOUVEAU_GEM_DOMAIN_GART)
 151                 flags |= TTM_PL_FLAG_TT;
 152         if (!flags || req->info.domain & NOUVEAU_GEM_DOMAIN_CPU)
 153                 flags |= TTM_PL_FLAG_SYSTEM;
 154
 155         if (!nouveau_gem_tile_flags_valid(dev, req->info.tile_flags))
 156                 return -EINVAL;
 157
 158         ret = nouveau_gem_new(dev, chan, req->info.size, req->align, flags,
 159                               req->info.tile_mode, req->info.tile_flags, false,
 160                               (req->info.domain & NOUVEAU_GEM_DOMAIN_MAPPABLE),
 161                               &nvbo);
 162         if (ret)
 163                 return ret;
 164
 165         ret = nouveau_gem_info(nvbo->gem, &req->info);
 166         if (ret)
 167                 goto out;
 168
 169         ret = drm_gem_handle_create(file_priv, nvbo->gem, &req->info.handle);
 170 out:
 171         drm_gem_object_handle_unreference_unlocked(nvbo->gem);
 172
 173         if (ret)
 174                 drm_gem_object_unreference_unlocked(nvbo->gem);
 175         return ret;
 176 }
 177
 178 static int
 179 nouveau_gem_set_domain(struct drm_gem_object *gem, uint32_t read_domains,
 180                        uint32_t write_domains, uint32_t valid_domains)
 181 {
 182         struct nouveau_bo *nvbo = gem->driver_private;
 183         struct ttm_buffer_object *bo = &nvbo->bo;
 184         uint32_t domains = valid_domains &
 185                 (write_domains ? write_domains : read_domains);
 186         uint32_t pref_flags = 0, valid_flags = 0;
 187
 188         if (!domains)
 189                 return -EINVAL;
 190
 191         if (valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 192                 valid_flags |= TTM_PL_FLAG_VRAM;
 193
 194         if (valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 195                 valid_flags |= TTM_PL_FLAG_TT;
 196
 197         if ((domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 198             bo->mem.mem_type == TTM_PL_VRAM)
 199                 pref_flags |= TTM_PL_FLAG_VRAM;
 200
 201         else if ((domains & NOUVEAU_GEM_DOMAIN_GART) &&
 202                  bo->mem.mem_type == TTM_PL_TT)
 203                 pref_flags |= TTM_PL_FLAG_TT;
 204
 205         else if (domains & NOUVEAU_GEM_DOMAIN_VRAM)
 206                 pref_flags |= TTM_PL_FLAG_VRAM;
 207
 208         else
 209                 pref_flags |= TTM_PL_FLAG_TT;
 210
 211         nouveau_bo_placement_set(nvbo, pref_flags, valid_flags);
 212
 213         return 0;
 214 }
 215
 216 struct validate_op {
 217         struct list_head vram_list;
 218         struct list_head gart_list;
 219         struct list_head both_list;
 220 };
 221
 222 static void
 223 validate_fini_list(struct list_head *list, struct nouveau_fence *fence)
 224 {
 225         struct list_head *entry, *tmp;
 226         struct nouveau_bo *nvbo;
 227
 228         list_for_each_safe(entry, tmp, list) {
 229                 nvbo = list_entry(entry, struct nouveau_bo, entry);
 230                 if (likely(fence)) {
 231                         struct nouveau_fence *prev_fence;
 232
 233                         spin_lock(&nvbo->bo.lock);
 234                         prev_fence = nvbo->bo.sync_obj;
 235                         nvbo->bo.sync_obj = nouveau_fence_ref(fence);
 236                         spin_unlock(&nvbo->bo.lock);
 237                         nouveau_fence_unref((void *)&prev_fence);
 238                 }
 239
 240                 if (unlikely(nvbo->validate_mapped)) {
 241                         ttm_bo_kunmap(&nvbo->kmap);
 242                         nvbo->validate_mapped = false;
 243                 }
 244
 245                 list_del(&nvbo->entry);
 246                 nvbo->reserved_by = NULL;
 247                 ttm_bo_unreserve(&nvbo->bo);
 248                 drm_gem_object_unreference(nvbo->gem);
 249         }
 250 }
 251
 252 static void
 253 validate_fini(struct validate_op *op, struct nouveau_fence* fence)
 254 {
 255         validate_fini_list(&op->vram_list, fence);
 256         validate_fini_list(&op->gart_list, fence);
 257         validate_fini_list(&op->both_list, fence);
 258 }
 259
 260 static int
 261 validate_init(struct nouveau_channel *chan, struct drm_file *file_priv,
 262               struct drm_nouveau_gem_pushbuf_bo *pbbo,
 263               int nr_buffers, struct validate_op *op)
 264 {
 265         struct drm_device *dev = chan->dev;
 266         struct drm_nouveau_private *dev_priv = dev->dev_private;
 267         uint32_t sequence;
 268         int trycnt = 0;
 269         int ret, i;
 270
 271         sequence = atomic_add_return(1, &dev_priv->ttm.validate_sequence);
 272 retry:
 273         if (++trycnt > 100000) {
 274                 NV_ERROR(dev, "%s failed and gave up.\n", __func__);
 275                 return -EINVAL;
 276         }
 277
 278         for (i = 0; i < nr_buffers; i++) {
 279                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[i];
 280                 struct drm_gem_object *gem;
 281                 struct nouveau_bo *nvbo;
 282
 283                 gem = drm_gem_object_lookup(dev, file_priv, b->handle);
 284                 if (!gem) {
 285                         NV_ERROR(dev, "Unknown handle 0x%08x\n", b->handle);
 286                         validate_fini(op, NULL);
 287                         return -EINVAL;
 288                 }
 289                 nvbo = gem->driver_private;
 290
 291                 if (nvbo->reserved_by && nvbo->reserved_by == file_priv) {
 292                         NV_ERROR(dev, "multiple instances of buffer %d on "
 293                                       "validation list\n", b->handle);
 294                         validate_fini(op, NULL);
 295                         return -EINVAL;
 296                 }
 297
 298                 ret = ttm_bo_reserve(&nvbo->bo, false, false, true, sequence);
 299                 if (ret) {
 300                         validate_fini(op, NULL);
 301                         if (ret == -EAGAIN)
 302                                 ret = ttm_bo_wait_unreserved(&nvbo->bo, false);
 303                         drm_gem_object_unreference(gem);
 304                         if (ret) {
 305                                 NV_ERROR(dev, "fail reserve\n");
 306                                 return ret;
 307                         }
 308                         goto retry;
 309                 }
 310
 311                 b->user_priv = (uint64_t)(unsigned long)nvbo;
 312                 nvbo->reserved_by = file_priv;
 313                 nvbo->pbbo_index = i;
 314                 if ((b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM) &&
 315                     (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART))
 316                         list_add_tail(&nvbo->entry, &op->both_list);
 317                 else
 318                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_VRAM)
 319                         list_add_tail(&nvbo->entry, &op->vram_list);
 320                 else
 321                 if (b->valid_domains & NOUVEAU_GEM_DOMAIN_GART)
 322                         list_add_tail(&nvbo->entry, &op->gart_list);
 323                 else {
 324                         NV_ERROR(dev, "invalid valid domains: 0x%08x\n",
 325                                  b->valid_domains);
 326                         list_add_tail(&nvbo->entry, &op->both_list);
 327                         validate_fini(op, NULL);
 328                         return -EINVAL;
 329                 }
 330
 331                 if (unlikely(atomic_read(&nvbo->bo.cpu_writers) > 0)) {
 332                         validate_fini(op, NULL);
 333
 334                         if (nvbo->cpu_filp == file_priv) {
 335                                 NV_ERROR(dev, "bo %p mapped by process trying "
 336                                               "to validate it!\n", nvbo);
 337                                 return -EINVAL;
 338                         }
 339
 340                         ret = ttm_bo_wait_cpu(&nvbo->bo, false);
 341                         if (ret) {
 342                                 NV_ERROR(dev, "fail wait_cpu\n");
 343                                 return ret;
 344                         }
 345                         goto retry;
 346                 }
 347         }
 348
 349         return 0;
 350 }
 351
 352 static int
 353 validate_list(struct nouveau_channel *chan, struct list_head *list,
 354               struct drm_nouveau_gem_pushbuf_bo *pbbo, uint64_t user_pbbo_ptr)
 355 {
 356         struct drm_nouveau_gem_pushbuf_bo __user *upbbo =
 357                                 (void __force __user *)(uintptr_t)user_pbbo_ptr;
 358         struct drm_device *dev = chan->dev;
 359         struct nouveau_bo *nvbo;
 360         int ret, relocs = 0;
 361
 362         list_for_each_entry(nvbo, list, entry) {
 363                 struct drm_nouveau_gem_pushbuf_bo *b = &pbbo[nvbo->pbbo_index];
 364
 365                 ret = nouveau_bo_sync_gpu(nvbo, chan);
 366                 if (unlikely(ret)) {
 367                         NV_ERROR(dev, "fail pre-validate sync\n");
 368                         return ret;
 369                 }
 370
 371                 ret = nouveau_gem_set_domain(nvbo->gem, b->read_domains,
 372                                              b->write_domains,
 373                                              b->valid_domains);
 374                 if (unlikely(ret)) {
 375                         NV_ERROR(dev, "fail set_domain\n");
 376                         return ret;
 377                 }
 378
 379                 nvbo->channel = (b->read_domains & (1 << 31)) ? NULL : chan;
 380                 ret = ttm_bo_validate(&nvbo->bo, &nvbo->placement,
 381                                       false, false, false);
 382                 nvbo->channel = NULL;
 383                 if (unlikely(ret)) {
 384                         NV_ERROR(dev, "fail ttm_validate\n");
 385                         return ret;
 386                 }
 387
 388                 ret = nouveau_bo_sync_gpu(nvbo, chan);
 389                 if (unlikely(ret)) {
 390                         NV_ERROR(dev, "fail post-validate sync\n");
 391                         return ret;
 392                 }
 393
 394                 if (nvbo->bo.offset == b->presumed.offset &&
 395                     ((nvbo->bo.mem.mem_type == TTM_PL_VRAM &&
 396                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_VRAM) ||
 397                      (nvbo->bo.mem.mem_type == TTM_PL_TT &&
 398                       b->presumed.domain & NOUVEAU_GEM_DOMAIN_GART)))
 399                         continue;
 400
 401                 if (nvbo->bo.mem.mem_type == TTM_PL_TT)
 402                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_GART;
 403                 else
 404                         b->presumed.domain = NOUVEAU_GEM_DOMAIN_VRAM;
 405                 b->presumed.offset = nvbo->bo.offset;
 406                 b->presumed.valid = 0;
 407                 relocs++;
 408
 409                 if (DRM_COPY_TO_USER(&upbbo[nvbo->pbbo_index].presumed,
 410                                      &b->presumed, sizeof(b->presumed)))
 411                         return -EFAULT;
 412         }
 413
 414         return relocs;
 415 }
 416
 417 static int
 418 nouveau_gem_pushbuf_validate(struct nouveau_channel *chan,
 419                              struct drm_file *file_priv,
 420                              struct drm_nouveau_gem_pushbuf_bo *pbbo,
 421                              uint64_t user_buffers, int nr_buffers,
 422                              struct validate_op *op, int *apply_relocs)
 423 {
 424         struct drm_device *dev = chan->dev;
 425         int ret, relocs = 0;
 426
 427         INIT_LIST_HEAD(&op->vram_list);
 428         INIT_LIST_HEAD(&op->gart_list);
 429         INIT_LIST_HEAD(&op->both_list);
 430
 431         if (nr_buffers == 0)
 432                 return 0;
 433
 434         ret = validate_init(chan, file_priv, pbbo, nr_buffers, op);
 435         if (unlikely(ret)) {
 436                 NV_ERROR(dev, "validate_init\n");
 437                 return ret;
 438         }
 439
 440         ret = validate_list(chan, &op->vram_list, pbbo, user_buffers);
 441         if (unlikely(ret < 0)) {
 442                 NV_ERROR(dev, "validate vram_list\n");
 443                 validate_fini(op, NULL);
 444                 return ret;
 445         }
 446         relocs += ret;
 447
 448         ret = validate_list(chan, &op->gart_list, pbbo, user_buffers);
 449         if (unlikely(ret < 0)) {
 450                 NV_ERROR(dev, "validate gart_list\n");
 451                 validate_fini(op, NULL);
 452                 return ret;
 453         }
 454         relocs += ret;
 455
 456         ret = validate_list(chan, &op->both_list, pbbo, user_buffers);
 457         if (unlikely(ret < 0)) {
 458                 NV_ERROR(dev, "validate both_list\n");
 459                 validate_fini(op, NULL);
 460                 return ret;
 461         }
 462         relocs += ret;
 463
 464         *apply_relocs = relocs;
 465         return 0;
 466 }
 467
 468 static inline void *
 469 u_memcpya(uint64_t user, unsigned nmemb, unsigned size)
 470 {
 471         void *mem;
 472         void __user *userptr = (void __force __user *)(uintptr_t)user;
 473
 474         mem = kmalloc(nmemb * size, GFP_KERNEL);
 475         if (!mem)
 476                 return ERR_PTR(-ENOMEM);
 477
 478         if (DRM_COPY_FROM_USER(mem, userptr, nmemb * size)) {
 479                 kfree(mem);
 480                 return ERR_PTR(-EFAULT);
 481         }
 482
 483         return mem;
 484 }
 485
 486 static int
 487 nouveau_gem_pushbuf_reloc_apply(struct drm_device *dev,
 488                                 struct drm_nouveau_gem_pushbuf *req,
 489                                 struct drm_nouveau_gem_pushbuf_bo *bo)
 490 {
 491         struct drm_nouveau_gem_pushbuf_reloc *reloc = NULL;
 492         int ret = 0;
 493         unsigned i;
 494
 495         reloc = u_memcpya(req->relocs, req->nr_relocs, sizeof(*reloc));
 496         if (IS_ERR(reloc))
 497                 return PTR_ERR(reloc);
 498
 499         for (i = 0; i < req->nr_relocs; i++) {
 500                 struct drm_nouveau_gem_pushbuf_reloc *r = &reloc[i];
 501                 struct drm_nouveau_gem_pushbuf_bo *b;
 502                 struct nouveau_bo *nvbo;
 503                 uint32_t data;
 504
 505                 if (unlikely(r->bo_index > req->nr_buffers)) {
 506                         NV_ERROR(dev, "reloc bo index invalid\n");
 507                         ret = -EINVAL;
 508                         break;
 509                 }
 510
 511                 b = &bo[r->bo_index];
 512                 if (b->presumed.valid)
 513                         continue;
 514
 515                 if (unlikely(r->reloc_bo_index > req->nr_buffers)) {
 516                         NV_ERROR(dev, "reloc container bo index invalid\n");
 517                         ret = -EINVAL;
 518                         break;
 519                 }
 520                 nvbo = (void *)(unsigned long)bo[r->reloc_bo_index].user_priv;
 521
 522                 if (unlikely(r->reloc_bo_offset + 4 >
 523                              nvbo->bo.mem.num_pages << PAGE_SHIFT)) {
 524                         NV_ERROR(dev, "reloc outside of bo\n");
 525                         ret = -EINVAL;
 526                         break;
 527                 }
 528
 529                 if (!nvbo->kmap.virtual) {
 530                         ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.mem.num_pages,
 531                                           &nvbo->kmap);
 532                         if (ret) {
 533                                 NV_ERROR(dev, "failed kmap for reloc\n");
 534                                 break;
 535                         }
 536                         nvbo->validate_mapped = true;
 537                 }
 538
 539                 if (r->flags & NOUVEAU_GEM_RELOC_LOW)
 540                         data = b->presumed.offset + r->data;
 541                 else
 542                 if (r->flags & NOUVEAU_GEM_RELOC_HIGH)
 543                         data = (b->presumed.offset + r->data) >> 32;
 544                 else
 545                         data = r->data;
 546
 547                 if (r->flags & NOUVEAU_GEM_RELOC_OR) {
 548                         if (b->presumed.domain == NOUVEAU_GEM_DOMAIN_GART)
 549                                 data |= r->tor;
 550                         else
 551                                 data |= r->vor;
 552                 }
 553
 554                 spin_lock(&nvbo->bo.lock);
 555                 ret = ttm_bo_wait(&nvbo->bo, false, false, false);
 556                 spin_unlock(&nvbo->bo.lock);
 557                 if (ret) {
 558                         NV_ERROR(dev, "reloc wait_idle failed: %d\n", ret);
 559                         break;
 560                 }
 561
 562                 nouveau_bo_wr32(nvbo, r->reloc_bo_offset >> 2, data);
 563         }
 564
 565         kfree(reloc);
 566         return ret;
 567 }
 568
 569 int
 570 nouveau_gem_ioctl_pushbuf(struct drm_device *dev, void *data,
 571                           struct drm_file *file_priv)
 572 {
 573         struct drm_nouveau_private *dev_priv = dev->dev_private;
 574         struct drm_nouveau_gem_pushbuf *req = data;
 575         struct drm_nouveau_gem_pushbuf_push *push;
 576         struct drm_nouveau_gem_pushbuf_bo *bo;
 577         struct nouveau_channel *chan;
 578         struct validate_op op;
 579         struct nouveau_fence *fence = NULL;
 580         int i, j, ret = 0, do_reloc = 0;
 581
 582         NOUVEAU_GET_USER_CHANNEL_WITH_RETURN(req->channel, file_priv, chan);
 583
 584         req->vram_available = dev_priv->fb_aper_free;
 585         req->gart_available = dev_priv->gart_info.aper_free;
 586         if (unlikely(req->nr_push == 0))
 587                 goto out_next;
 588
 589         if (unlikely(req->nr_push > NOUVEAU_GEM_MAX_PUSH)) {
 590                 NV_ERROR(dev, "pushbuf push count exceeds limit: %d max %d\n",
 591                          req->nr_push, NOUVEAU_GEM_MAX_PUSH);
 592                 return -EINVAL;
 593         }
 594
 595         if (unlikely(req->nr_buffers > NOUVEAU_GEM_MAX_BUFFERS)) {
 596                 NV_ERROR(dev, "pushbuf bo count exceeds limit: %d max %d\n",
 597                          req->nr_buffers, NOUVEAU_GEM_MAX_BUFFERS);
 598                 return -EINVAL;
 599         }
 600
 601         if (unlikely(req->nr_relocs > NOUVEAU_GEM_MAX_RELOCS)) {
 602                 NV_ERROR(dev, "pushbuf reloc count exceeds limit: %d max %d\n",
 603                          req->nr_relocs, NOUVEAU_GEM_MAX_RELOCS);
 604                 return -EINVAL;
 605         }
 606
 607         push = u_memcpya(req->push, req->nr_push, sizeof(*push));
 608         if (IS_ERR(push))
 609                 return PTR_ERR(push);
 610
 611         bo = u_memcpya(req->buffers, req->nr_buffers, sizeof(*bo));
 612         if (IS_ERR(bo)) {
 613                 kfree(push);
 614                 return PTR_ERR(bo);
 615         }
 616
 617         mutex_lock(&dev->struct_mutex);
 618
 619         /* Mark push buffers as being used on PFIFO, the validation code
 620          * will then make sure that if the pushbuf bo moves, that they
 621          * happen on the kernel channel, which will in turn cause a sync
 622          * to happen before we try and submit the push buffer.
 623          */
 624         for (i = 0; i < req->nr_push; i++) {
 625                 if (push[i].bo_index >= req->nr_buffers) {
 626                         NV_ERROR(dev, "push %d buffer not in list\n", i);
 627                         ret = -EINVAL;
 628                         goto out;
 629                 }
 630
 631                 bo[push[i].bo_index].read_domains |= (1 << 31);
 632         }
 633
 634         /* Validate buffer list */
 635         ret = nouveau_gem_pushbuf_validate(chan, file_priv, bo, req->buffers,
 636                                            req->nr_buffers, &op, &do_reloc);
 637         if (ret) {
 638                 NV_ERROR(dev, "validate: %d\n", ret);
 639                 goto out;
 640         }
 641
 642         /* Apply any relocations that are required */
 643         if (do_reloc) {
 644                 ret = nouveau_gem_pushbuf_reloc_apply(dev, req, bo);
 645                 if (ret) {
 646                         NV_ERROR(dev, "reloc apply: %d\n", ret);
 647                         goto out;
 648                 }
 649         }
 650
 651         if (chan->dma.ib_max) {
 652                 ret = nouveau_dma_wait(chan, req->nr_push + 1, 6);
 653                 if (ret) {
 654                         NV_INFO(dev, "nv50cal_space: %d\n", ret);
 655                         goto out;
 656                 }
 657
 658                 for (i = 0; i < req->nr_push; i++) {
 659                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 660                                 bo[push[i].bo_index].user_priv;
 661
 662                         nv50_dma_push(chan, nvbo, push[i].offset,
 663                                       push[i].length);
 664                 }
 665         } else
 666         if (dev_priv->card_type >= NV_20) {
 667                 ret = RING_SPACE(chan, req->nr_push * 2);
 668                 if (ret) {
 669                         NV_ERROR(dev, "cal_space: %d\n", ret);
 670                         goto out;
 671                 }
 672
 673                 for (i = 0; i < req->nr_push; i++) {
 674                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 675                                 bo[push[i].bo_index].user_priv;
 676                         struct drm_mm_node *mem = nvbo->bo.mem.mm_node;
 677
 678                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 679                                         push[i].offset) | 2);
 680                         OUT_RING(chan, 0);
 681                 }
 682         } else {
 683                 ret = RING_SPACE(chan, req->nr_push * (2 + NOUVEAU_DMA_SKIPS));
 684                 if (ret) {
 685                         NV_ERROR(dev, "jmp_space: %d\n", ret);
 686                         goto out;
 687                 }
 688
 689                 for (i = 0; i < req->nr_push; i++) {
 690                         struct nouveau_bo *nvbo = (void *)(unsigned long)
 691                                 bo[push[i].bo_index].user_priv;
 692                         struct drm_mm_node *mem = nvbo->bo.mem.mm_node;
 693                         uint32_t cmd;
 694
 695                         cmd = chan->pushbuf_base + ((chan->dma.cur + 2) << 2);
 696                         cmd |= 0x20000000;
 697                         if (unlikely(cmd != req->suffix0)) {
 698                                 if (!nvbo->kmap.virtual) {
 699                                         ret = ttm_bo_kmap(&nvbo->bo, 0,
 700                                                           nvbo->bo.mem.
 701                                                           num_pages,
 702                                                           &nvbo->kmap);
 703                                         if (ret) {
 704                                                 WIND_RING(chan);
 705                                                 goto out;
 706                                         }
 707                                         nvbo->validate_mapped = true;
 708                                 }
 709
 710                                 nouveau_bo_wr32(nvbo, (push[i].offset +
 711                                                 push[i].length - 8) / 4, cmd);
 712                         }
 713
 714                         OUT_RING(chan, ((mem->start << PAGE_SHIFT) +
 715                                         push[i].offset) | 0x20000000);
 716                         OUT_RING(chan, 0);
 717                         for (j = 0; j < NOUVEAU_DMA_SKIPS; j++)
 718                                 OUT_RING(chan, 0);
 719                 }
 720         }
 721
 722         ret = nouveau_fence_new(chan, &fence, true);
 723         if (ret) {
 724                 NV_ERROR(dev, "error fencing pushbuf: %d\n", ret);
 725                 WIND_RING(chan);
 726                 goto out;
 727         }
 728
 729 out:
 730         validate_fini(&op, fence);
 731         nouveau_fence_unref((void**)&fence);
 732         mutex_unlock(&dev->struct_mutex);
 733         kfree(bo);
 734         kfree(push);
 735
 736 out_next:
 737         if (chan->dma.ib_max) {
 738                 req->suffix0 = 0x00000000;
 739                 req->suffix1 = 0x00000000;
 740         } else
 741         if (dev_priv->card_type >= NV_20) {
 742                 req->suffix0 = 0x00020000;
 743                 req->suffix1 = 0x00000000;
 744         } else {
 745                 req->suffix0 = 0x20000000 |
 746                               (chan->pushbuf_base + ((chan->dma.cur + 2) << 2));
 747                 req->suffix1 = 0x00000000;
 748         }
 749
 750         return ret;
 751 }
 752
 753 static inline uint32_t
 754 domain_to_ttm(struct nouveau_bo *nvbo, uint32_t domain)
 755 {
 756         uint32_t flags = 0;
 757
 758         if (domain & NOUVEAU_GEM_DOMAIN_VRAM)
 759                 flags |= TTM_PL_FLAG_VRAM;
 760         if (domain & NOUVEAU_GEM_DOMAIN_GART)
 761                 flags |= TTM_PL_FLAG_TT;
 762
 763         return flags;
 764 }
 765
 766 int
 767 nouveau_gem_ioctl_cpu_prep(struct drm_device *dev, void *data,
 768                            struct drm_file *file_priv)
 769 {
 770         struct drm_nouveau_gem_cpu_prep *req = data;
 771         struct drm_gem_object *gem;
 772         struct nouveau_bo *nvbo;
 773         bool no_wait = !!(req->flags & NOUVEAU_GEM_CPU_PREP_NOWAIT);
 774         int ret = -EINVAL;
 775
 776         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 777         if (!gem)
 778                 return ret;
 779         nvbo = nouveau_gem_object(gem);
 780
 781         if (nvbo->cpu_filp) {
 782                 if (nvbo->cpu_filp == file_priv)
 783                         goto out;
 784
 785                 ret = ttm_bo_wait_cpu(&nvbo->bo, no_wait);
 786                 if (ret)
 787                         goto out;
 788         }
 789
 790         if (req->flags & NOUVEAU_GEM_CPU_PREP_NOBLOCK) {
 791                 spin_lock(&nvbo->bo.lock);
 792                 ret = ttm_bo_wait(&nvbo->bo, false, false, no_wait);
 793                 spin_unlock(&nvbo->bo.lock);
 794         } else {
 795                 ret = ttm_bo_synccpu_write_grab(&nvbo->bo, no_wait);
 796                 if (ret == 0)
 797                         nvbo->cpu_filp = file_priv;
 798         }
 799
 800 out:
 801         drm_gem_object_unreference_unlocked(gem);
 802         return ret;
 803 }
 804
 805 int
 806 nouveau_gem_ioctl_cpu_fini(struct drm_device *dev, void *data,
 807                            struct drm_file *file_priv)
 808 {
 809         struct drm_nouveau_gem_cpu_prep *req = data;
 810         struct drm_gem_object *gem;
 811         struct nouveau_bo *nvbo;
 812         int ret = -EINVAL;
 813
 814         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 815         if (!gem)
 816                 return ret;
 817         nvbo = nouveau_gem_object(gem);
 818
 819         if (nvbo->cpu_filp != file_priv)
 820                 goto out;
 821         nvbo->cpu_filp = NULL;
 822
 823         ttm_bo_synccpu_write_release(&nvbo->bo);
 824         ret = 0;
 825
 826 out:
 827         drm_gem_object_unreference_unlocked(gem);
 828         return ret;
 829 }
 830
 831 int
 832 nouveau_gem_ioctl_info(struct drm_device *dev, void *data,
 833                        struct drm_file *file_priv)
 834 {
 835         struct drm_nouveau_gem_info *req = data;
 836         struct drm_gem_object *gem;
 837         int ret;
 838
 839         gem = drm_gem_object_lookup(dev, file_priv, req->handle);
 840         if (!gem)
 841                 return -EINVAL;
 842
 843         ret = nouveau_gem_info(gem, req);
 844         drm_gem_object_unreference_unlocked(gem);
 845         return ret;
 846 }
 847